From publisher blurb:
Mischief and Mayhem await!
Rubble-Imps are roughly four feet tall, grayish humanoids with leathery twelve-foot wingspans and a well-deserved reputation for causing considerable mayhem, misery, and discord. When either working alone, in flocks, or as the scouts, spies, and thieves of villainous masters, these nasty things are sure to cause your player characters big trouble, if not a fatal end.
This is our 8th Monday Mutant of an initial 12 creature assortment. Included in this 7 page PDF are tables for potential allies, mutations, precious items, along with a collection of adventure hooks that center around the mayhem rubble-imps can cause to a post-apocalyptic village and how the characters are coaxed to intervene.